diff --git a/Checkpoints/Checkpoint4.ipynb b/Checkpoints/Checkpoint4.ipynb
index 4643a38dcacafc4d3d407f4498e81bbad9ce4592..f8b03f13e45f74d87bc81638386de158b341466a 100644
--- a/Checkpoints/Checkpoint4.ipynb
+++ b/Checkpoints/Checkpoint4.ipynb
@@ -8,7 +8,7 @@
    "source": [
     "## Checkpoint 4\n",
     "\n",
-    "![ch4.png](ch4.png)  \n",
+    "![ch4.jpg](ch4.jpg)  \n",
     "\n",
     "***“In the middle of the journey of our life I found myself within a dark woods where the straight way was lost.”***\n",
     "― Dante Alighieri, Inferno\n",
diff --git a/Checkpoints/photo_2024-09-24_09-58-02.jpg b/Checkpoints/ch4.jpg
similarity index 100%
rename from Checkpoints/photo_2024-09-24_09-58-02.jpg
rename to Checkpoints/ch4.jpg